Best Zinc-Rich Foods for Freshwater Fishs

Ranked by zinc content among foods safe for freshwater fishs in the Creature Feast catalog.

Bloodworms per 100g freeze-dried: ~3mg zinc Bloodworms provide zinc that supports immune function and the enzymatic reactions needed for scale regeneration and wound healing in freshwater fish. Zinc is particularly important in closed aquarium systems where fish face constant low-level pathogen exposure and need robust immune surveillance.

Brine shrimp per 100g freeze-dried: ~2.5mg zinc Brine shrimp deliver zinc from their crustacean exoskeleton and soft tissues. The zinc content supports metalloenzyme function in fish — over 300 enzymes require zinc as a cofactor, including those involved in protein synthesis and DNA replication.

Peas per 100g shelled: ~1.2mg zinc Peas provide a modest plant-based zinc contribution. While less bioavailable than animal-sourced zinc, the phytate content in peas is lower than in many other plant foods, allowing reasonable zinc absorption for fish.

Spirulina flakes per 100g: ~2mg zinc Spirulina flakes offer zinc in a concentrated algal matrix. The zinc in spirulina supports the immune system and skin integrity of herbivorous fish species that rely more heavily on plant-based nutrition.